Leaves attached to stems at nodes

Cards (19)

What are leaf nodes?
Points where leaves attach to stems
What are internodes?
Stem sections between nodes
What are the key terms related to leaf nodes and stems?
Leaf nodes: Points where leaves attach to stems
Internodes: Stem sections between nodes
Phyllotaxy: Arrangement of leaves on a stem
Leaf venation: Pattern of veins in a leaf
What is phyllotaxy?
The study of the arrangement of leaves
What is leaf venation?
The pattern of veins in a leaf
Why is the structure of leaf nodes important?
It helps understand plant anatomy and growth
What is the arrangement of leaves on stems called?
Phyllotaxy
What are the main types of phyllotaxy?
Alternate (or Spiral) Phyllotaxy: One leaf per node
Opposite Phyllotaxy: Two leaves per node, paired
Whorled Phyllotaxy: Three or more leaves per node
Rosulate Phyllotaxy: Leaves in a rosette pattern
What are the common types of leaf venation patterns?
Reticulate (net-like) venation: Veins form a network
Parallel venation: Veins run parallel to each other
Pinnate venation: Veins branch from a central midrib
How does understanding leaf structure help in botany?
It aids in identification and classification
What does opposite phyllotaxy indicate about a plant's leaf arrangement?
Leaves are paired directly across from each other
How does whorled phyllotaxy differ from alternate phyllotaxy?
Whorled has multiple leaves per node
What is the significance of leaf venation patterns in plant identification?
They help distinguish between plant species
What type of phyllotaxy do plants with leaves arranged in pairs exhibit?
Opposite phyllotaxy
What type of phyllotaxy do plants with leaves arranged in a rosette pattern exhibit?
Rosulate phyllotaxy
What type of venation do oak leaves have?
Reticulate venation
What type of venation do grass leaves have?
Parallel venation
What type of venation do most broadleaf trees have?
Pinnate venation
Why is it important to study leaf arrangements and venation?
It aids in understanding plant growth and classification